EP3984833A1 - Seitenairbagvorrichtung, sitz für ein fahrzeug, fahrzeug, verfahren zum entfalten eines airbags und verwendung des airbags - Google Patents
Seitenairbagvorrichtung, sitz für ein fahrzeug, fahrzeug, verfahren zum entfalten eines airbags und verwendung des airbags Download PDFInfo
- Publication number
- EP3984833A1 EP3984833A1 EP21199756.4A EP21199756A EP3984833A1 EP 3984833 A1 EP3984833 A1 EP 3984833A1 EP 21199756 A EP21199756 A EP 21199756A EP 3984833 A1 EP3984833 A1 EP 3984833A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- base cloth
- airbag
- vehicle
- joint portion
- protection area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 7
- 239000004744 fabric Substances 0.000 claims abstract description 141
- 230000001105 regulatory effect Effects 0.000 claims abstract description 74
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 101001108245 Cavia porcellus Neuronal pentraxin-2 Proteins 0.000 claims 3
- 210000000038 chest Anatomy 0.000 description 9
- 210000000988 bone and bone Anatomy 0.000 description 8
- 238000009958 sewing Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 210000001015 abdomen Anatomy 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 210000001562 sternum Anatomy 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/207—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle seats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
- B60R2021/23146—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection seat mounted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/2334—Expansion control features
- B60R21/2338—Tethers
- B60R2021/23382—Internal tether means
Definitions
- the present invention relates to a side airbag which is deployed between an occupant and a side wall portion (door) in a side collision (side impact) of an automobile.
- a side airbag device which is configured to be rapidly deployed forwardly from a side portion of a seatback between the occupant and the door (side wall portion) when a vehicle-collision load is detected has been used for reducing the collision impact transmitted to an upper body of the occupant, such as a head portion or a chest portion, in the vehicle side collision.
- a sub deployment portion is provided inside the seatback and this sub deployment portion is controlled to be deployed at the same time when the side airbag is deployed forwardly from the seatback side portion between the occupant and the side wall portion, whereby the seatback side portion can expand and move the occupant obliquely-forwardly in a cabin (see Japanese Patent Laid-Open Publication No. 2017-119450 ( US2017/0182963 A1 ), for example).
- the collision impact transmitted to the occupant in the side collision can be reduced to a certain degree by enlarging a space between the occupant and the side wall portion, but the moving quantity of the occupant may be insufficient because the occupant is moved by way of the seatback.
- a structure in which the occupant is moved inwardly by a deployment pressure of the side airbag not by way of the seatback may be considered.
- the resistance against the impact differs among a chest portion, an abdomen portion, a lumbar portion, and the like.
- the resistance against the impact differs depending on a shape of a bone's cross section, so that it is necessary to reduce the load applied to a part of the body having a small (slender) bone's cross section more compared to another part of the body.
- the collision load be applied to the part of the body having a larger bone's cross section.
- An object of the present invention is to provide a side airbag device which can compatibly attain optimization of load distribution including the load applied to the high-resistance part of the skeleton structure of the human body and securement of the space between the occupant and the side wall portion and also which is so compact that the superior installation property can be provided.
- Another object of the present invention is to provide a seat including the above side airbag device, a vehicle including the seat, and a method of deploying an airbag and use of an airbag corresponding to the above side airbag device.
- the inventor of the present invention has paid attention to a change in the shape of the bone's cross section between a front side and a rear side of a rib which is part of the skeleton structure of the human body and conducted earnest investigations for achieving the ideal occupant protection by the side airbag.
- the bone's cross section at around the backbone (spine) of the rear side of the rib shows the large (thick) shape and the high resistance against the impact.
- the bone's cross section at around a breast bone of the front side of the rib shows the small (slender) shape and the low resistance against the impact. Consequently, the inventor has found that the load distribution at the chest portion of the human body can be optimized by making a load-distribution ratio at the high-resistance part of the rib's rear side larger than that at the low-resistance part of the rib's front side.
- the outside base cloth in the airbag's deployment, is deployed forwardly and in the vehicle vertical direction from inside the seatback's side portion so as to form the side-portion protection area to protect the side portion of the occupant.
- the regulating member is joined to the inside base cloth.
- the inside base cloth is in a loosened state relative to the regulating member by setting in such a manner that the length, in the vehicle longitudinal direction, between the front-side joint portion and the rear-side joint portion of the regulating member is shorter than that between the front-side joint portion and the rear-side joint portion of the inside base cloth. Accordingly, the forward deployment of the inside base cloth is regulated (restricted) by the regulating member.
- a loosened part of the inside base cloth is deployed inwardly, in the vehicle width direction, instead of this forward deployment, so that the back-portion protection area is formed.
- the part of the inside base cloth is deployed between the occupant's back portion and the seatback as the back-portion protection area.
- the occupant can be moved inwardly greatly by reducing a gap between the occupant's back portion and the seatback properly and making the distribution ratio of the load applied to the high-resistance part of the rib's rear side properly large in the vehicle side collision.
- the upper body of the occupant can be rotated inwardly, in the vehicle width direction, by deploying (forming) the back-portion protection area at the occupant's back portion, so that the low-resistance part of the rib's front side of the occupant can be kept away from the door (side wall portion).
- the space between the occupant and the side wall portion in the vehicle side collision is so enlarged that the impact applied to the occupant can be reduced.
- the distribution ratio of the load applied to the low-resistance part of the rib's front side of the occupant is small, the ideal load-distribution ratio by means of the side airbag can be achieved.
- the back-portion protection area is deployed such that the part of the inside base cloth goes around the occupant's back portion. That is, a part of the single airbag becomes the side-portion protection area and another part of the single airbag becomes the back-portion protection area. Therefore, it is unnecessary to provide plural airbags, so that the compact airbag can be provided.
- the gap, in the vehicle vertical direction, between the occupant's back portion and the seatback changes such that its upper side is larger than its lower side because a slant angle of the upper body of the occupant seated in the seat is different from a slant angle of the seatback in the vehicle side view.
- the regulating member may be constituted by upper-side and lower-side regulating members which are provided side by side in the vehicle vertical direction, and, particularly, the length, in the vehicle longitudinal direction, between the front-side joint portion and the rear-side joint portion of the lower-side regulating member may be shorter than that between the front-side joint portion and the rear-side joint portion of the upper-side regulating member.
- the size of the deployed back-portion protection area can be changed according to the gap between the occupant's back portion and the seatback. Specifically, since the length, in the vehicle longitudinal direction, between the front-side joint portion and the rear-side joint portion of the upper-side regulating member is long relatively, an upper part of the back-portion protection area becomes large and a lower part of the back-portion protection area becomes small.
- the gap between the occupant's back portion and the seatback at the upper side of the seatback is relatively large compared to that at the lower side of the seatback as described above, the upper part of the back-portion protection area is large so as to match this large gap, whereas the lower part of the back-portion protection area is small so as to match this small gap. Accordingly, the load-distribution ratio at the high-resistance part of the rib's rear side of the occupant can be made uniform.
- the above-described regulating member may be constituted by a single regulating member provided with the front-side joint portion and the rear-side joint portion which are respectively configured to extend in the vehicle vertical direction, and, particularly, the front-side joint portion of the single regulating member may be configured to slant relative to the vehicle vertical direction such that the length, in the vehicle longitudinal direction, between the front-side joint portion and the rear-side joint portion of a lower side of the single regulating member is shorter than that between the front-side joint portion and the rear-side joint portion of an upper side of the single regulating member.
- the front-side joint portion is configured to slant such that the length, in the vehicle longitudinal direction, between the front-side joint portion and the rear-side joint portion of the lower side of the single regulating member is shorter than that between the front-side joint portion and the rear-side joint portion of the upper side of the single regulating member, even if the regulating member is a single, the upper part of the back-portion protection area becomes large and the lower part of the back-portion protection area becomes small like the above-described structure.
- the load-distribution ratio at the high-resistance part of the rib's rear side of the occupant can be made uniform so as to match a sitting state of the occupant.
- the above-described airbag in order to appropriately restraint a side portion area of the occupant (including the chest portion, the abdomen portion, and the lumbar portion), the above-described airbag may further have a chest-portion protection area for protecting the chest portion of the occupant and a lumbar-portion (or a lower back portion) protection area positioned below the chest-portion protection area, and the chest-portion protection area may be configured such that the length, in the vehicle longitudinal direction, thereof is shorter than that of the lumbar-portion protection area in the airbag deployment state.
- a recess portion is formed in the chest-portion protection area of the airbag which is recessed rearwardly from the lumbar-portion protection area, so that the chest-portion protection area does not reach the rib's front side even when it is deployed forwardly. Accordingly, the distribution ratio of the load applied to the low-resistance part of the rib's front side in the vehicle side collision can be made properly small.
- the airbag in order to achieve the ideal load-distribution ratio at the high-resistance part of the skeleton structure of the occupant including the chest portion and the lumbar portion, the airbag may further have a shoulder-portion protection area which is positioned above the chest-portion protection area, and the regulating member may be provided below the shoulder-portion protection area.
- the shoulder-portion protection area can be greatly deployed forwardly.
- the airbag is deployed between the occupant's back portion and the seatback by providing the regulating member, so that the load-distribution ratio at the rib's rear side and the lumbar portion of the occupant can be made properly large.
- the ideal load-distribution ratio by means of the airbag can be achieved.
- the impact load can be distributed at a whole part of the lumbar portion.
- the side-portion protection area is configured to be deployed forwardly and/or in the vehicle vertical direction from the side portion of the seatback.
- the back-portion protection area is configured to be deployed inwardly in the vehicle width direction.
- a vehicle seat which is provided with the above-described side airbag device according to the present invention may be configured such that the above-described airbag is configured such that the back-portion protection area is positioned on an inward side, in the vehicle width direction, of the side frame and the side-portion protection area is positioned on the outward side, in the vehicle width direction, of the side frame in a state where the airbag is stored inside the side portion of the seatback before deployment.
- the back-portion protection area and the side-portion protection area interfere with each other when the airbag is deployed, so that the smooth deployment of the airbag at the occupant's side portion and the back portion can be attained.
- a vehicle or automobile included the above vehicle seat.
- a method of deploying an airbag by inflation gas supplied from an inflator is provided.
- the inflator is fixed to a side frame extending in a vehicle vertical direction inside a side portion of a seatback of a vehicle seat.
- the airbag includes an inside base cloth which is provided to face an occupant side, an outside base cloth which is provided to face an outward side, in a vehicle width direction, of the inside base cloth and to be joined to the inside base cloth at a whole peripheral portion thereof, and a regulating member (8; 80) which is provided between the inside base cloth and the outside base cloth.
- the airbag has a side-portion protection area which is configured to be deployed at the occupant side in the vehicle vertical direction and a back-portion protection area which is configured to be deployed between a back portion of an occupant and the seatback.
- the regulating member is respectively joined to a front portion and a rear portion of the inside base cloth at a front-side joint portion and a rear-side joint portion, and the length, in a vehicle longitudinal direction, between the front-side joint portion and the rear-side joint portion of the regulating member is shorter than that between the front-side joint portion and the rear-side joint portion of the inside base cloth, whereby a joint state of the inside base cloth is loosened relative to the regulating member.
- the method includes positioning the rear-side joint portion, in an airbag deployment state, on a vehicle forward side of a front end portion of the side frame, and regulating forward deployment of the inside base cloth by the regulating member.
- the back-portion protection area of the airbag is constituted by a part of the inside base cloth.
- positioning the rear-side joint portion includes positioning the rear-side joint portion, in the airbag deployment state, on the vehicle forward side of the front end portion of the side frame but on a vehicle rearward side of an imaginary line connecting a hip point and a center position of a shoulder portion of a human body dummy AM50 for side-collision test seated in the vehicle seat in a vehicle side view.
- an airbag configured to be deployed by inflation gas supplied from the inflator.
- the inflator is fixed to a side frame extending in a vehicle vertical direction inside a side portion of a seatback of a vehicle seat.
- the airbag includes an inside base cloth which is provided to face an occupant side, an outside base cloth which is provided to face an outward side, in a vehicle width direction, of the inside base cloth and to be joined to the inside base cloth at a whole peripheral portion thereof, and a regulating member which is provided between the inside base cloth and the outside base cloth.
- the airbag has a side-portion protection area which is configured to be deployed at the occupant side in the vehicle vertical direction and a back-portion protection area which is configured to be deployed between a back portion of an occupant and the seatback.
- the regulating member is respectively joined to a front portion and a rear portion of the inside base cloth at a front-side joint portion and a rear-side joint portion.
- the length, in a vehicle longitudinal direction, between the front-side joint portion and the rear-side joint portion of the regulating member is set to be shorter than that between the front-side joint portion and the rear-side joint portion of the inside base cloth, whereby a joint state of the inside base cloth is loosened relative to the regulating member.
- the rear-side joint portion is configured, in an airbag deployment state, to be positioned on a vehicle forward side of a front end portion of the side frame.
- the back-portion protection area of the airbag is constituted by a part of the inside base cloth, forward deployment of which is regulated by the regulating member.
- the rear-side joint portion is configured, in the airbag deployment state, to be positioned on the vehicle forward side of the front end portion of the side frame but on a vehicle rearward side of an imaginary line connecting a hip point and a center position of a shoulder portion of a human body dummy AM50 for side-collision test seated in the vehicle seat in a vehicle side view.
- FIG. 1 shows a seat 2 for a vehicle which is provided with a side airbag device 1.
- the seat 2 is particularly a first-row seat (or a front seat) which is arranged at the foremost row in a cabin of the vehicle in the present embodiment.
- the seat 2 may be a second-row seat (or a rear seat) or a third-row seat which are arranged in back of the first-row seat.
- a side wall portion 4 of the vehicle is provided on a left side, i.e., on an outward side, in a vehicle width direction, of the seat 2.
- the side wall portion 4 is a door, a pillar, or the like, for example.
- the side wall portion which corresponds to the first-row seat is a front door, a B pillar (or a center pillar), or the like, for example.
- the side wall portion which corresponds to the second-row seat is a rear door, a C pillar (or a rear pillar), or the like, for example.
- the side wall portion which corresponds to the third-row seat is a tire house, a quarter pillar, or the like, for example.
- the seat 2 which is exemplified here is the one which is positioned at a left side in the cabin.
- this seat 2 may be the one which is positioned at a right side in the cabin.
- FIGS. 2 and 3 exemplify the seat 2 for the vehicle.
- the seat 2 comprises a seat cushion 21 and a seatback 22.
- the seat cushion 21 is a portion where an occupant 3 is seated.
- the seatback 22 is configured to stand upwardly at a rear end portion of the seat cushion 21.
- the seatback 22 supports a back portion of the occupant 3.
- a headrest not illustrated, is attached to an upper end portion of the seatback 22.
- the seatback 22 particularly comprises a seat frame 23, a seat pad 24, and a skin 25.
- the seat pad 24 is provided to cover a periphery of the seat frame 23.
- the skin 25 is covers over the seat pad 24.
- illustration of the seat pad 24 and the skin 25 is omitted, and the seat frame 23 is only illustrated.
- the seat fame 23 particularly comprises a first side frame 231, a second side frame 232, an upper frame 233, and a lower frame 234.
- the first side frame 231 is positioned on the outward side in the vehicle width direction, of the seat and the second side frame 232 is positioned on an inward side, in the vehicle width direction, of the seat.
- the first-and-second side fames 231, 232 are respectively configured to extend in a vertical direction.
- the upper frame 233 interconnects respective upper ends of the first-and-second side frames 231, 232 in the vehicle width direction
- the lower frame 234 interconnects respective lower ends of the first-and-second side frames 231, 232 in the vehicle width direction.
- the first-and-second side frames 231, 232 of the seat frame 23 are respectively made by bending a metal plate in such a manner that each cross section has a nearly U shape (see FIG. 3 ).
- the side airbag device 1 is attached to an outside face of the first side frame 231. That is, the side airbag device 1 is provided inside a side portion of the seatback 22 of the seat 2.
- the side airbag device 1 is provided with an airbag 5 and an inflator 11.
- the airbag 5 is stored inside the side portion of the seatback 22 in a folded state.
- the airbag 5 is deployed by inflation gas supplied from the inflater 11 in such a manner that it expands outside, breaking the seat pad 24 and the skin 25.
- the inflator 11 is particularly of a slender cylindrical shape and attached to an outside face of the first side frame 231 such that it extends along the first side frame 231.
- the type of the inflator 11 is not limited at all. Any type of inflator is applicable in the side airbag device 1.
- FIG. 4 exemplifies the airbag 5.
- the airbag 5 comprises an inside base cloth 6, an outside base cloth 7, and a tether 8 as a regulating (restricting) member.
- the outside base cloth 6, the outside base cloth 7, and the tether 8 are respectively made of a cloth which may have no elasticity or little elasticity.
- the inside base cloth 6 is positioned on the inward side, in the vehicle width direction, of the airbag.
- the inside base cloth 6 is provided to face the side of the occupant 3 seated in the seat 2.
- the outside base cloth 7 is provided to face an outward side, in the vehicle width direction, of the inside base cloth 6.
- the airbag 5 is particularly formed in a bag shape by the inside base cloth 6 and the outside base cloth 7 which are particularly sewed together at their whole peripheral edge parts.
- FIG. 4 shows a state where their sewing is released and the inside base cloth 6 and the outside base cloth 7 are expanded to the right and to the left, respectively. That is, respective faces of the inside base cloth 6 and the outside base cloth 7 which are shown in FIG. 4 constitute an inner face of the bag-shaped airbag 5.
- a left side of the inside base cloth 6 which is illustrated on the left of FIG. 4 corresponds to a vehicle forward side
- a right side of the inside base cloth 6 which is illustrated on the right of FIG. 4 corresponds to a vehicle rearward side
- a right side of the outside base cloth 7 which is illustrated on the right of FIG. 4 corresponds to the vehicle forward side
- a left side of the outside base cloth 7 which is illustrated on the left of FIG. 4 corresponds to the vehicle rearward side
- a lateral direction in FIG. 4 corresponds to a vehicle longitudinal direction.
- the airbag 5 has a shoulder-portion protection area 51, a chest-portion protection area 51, and a lumbar-portion (or a lower back portion) protection area 53 which are arranged in the vertical direction of the airbag 5.
- the shoulder-portion protection area 51 is an upper part of the airbag 5.
- the shoulder-portion protection area 51 protects a shoulder portion of the occupant 3 primarily.
- the chest-portion protection area 52 is positioned below the shoulder-portion protection area 51.
- the chest-portion protection area 52 is a middle part of the airbag 5.
- the chest-portion protection area 52 protects a chest portion of the occupant 3 primarily.
- the lumbar-portion protection area 53 is positioned below the chest-portion protection area 52.
- the lumbar-portion protection area 53 is a lower part of the airbag 5.
- the lumbar-portion protection area 53 protects a lumbar portion of the occupant 3 primarily.
- each of the inside base cloth 6 and the outside base cloth 7 is configured such that the length, in the longitudinal direction, of the shoulder-portion protection area 51 and the lumbar-portion protection area 53 is relatively long and the length, in the longitudinal direction, of the chest-portion protection area 52 is shorter than that of the shoulder-portion protection area 51 and the lumbar-portion protection area 53.
- the airbag 5 is configured as shown in FIG. 1 such that the chest-portion protection area 52 is recessed rearwardly from the shoulder-portion protection area 51 and the lumbar-portion protection area 53 when the airbag 5 is deployed.
- the airbag 5 is formed in a nearly inverse-C shape in the vehicle side view.
- the tether 8 is provided between the inside base cloth 6 and the outside base cloth 7. As shown in FIG. 4 , the tether 8 particularly includes an upper-side tether 81 and a lower-side tether 82. The upper-side tether 81 and the lower-side tether 82 are provided side by side in the vertical direction.
- the upper-side tether 81 is particularly located at a level in the vertical direction which substantially corresponds to the chest-portion protection area 52.
- the upper-side tether 81 extends forwardly from a rear end of the inside base cloth 6.
- a front end of the upper-side tether 81 extends up to around a front end of the chest-portion protection area 52 of the inside base cloth 6.
- a part of an front end edge of the upper-side tether 81 is cut out rearwardly.
- the lower-side tether 82 is particularly located at a level in the vertical direction which substantially corresponds to the lumbar-portion protection area 53.
- the lower-side tether 82 extends forwardly from the rear end of the inside base cloth 6.
- a front end of the lower-side tether 82 extends up to around a middle part of the lumbar-portion protection area 53 of the inside base cloth 6.
- a front end edge of the lower-side tether 82 is curved forwardly in a convex shape.
- the length, in the longitudinal direction, of the lower-side tether 82 is different from the length, in the longitudinal direction, of the upper-side tether 81.
- the upper-side tether 81 is longer than the lower-side tether 82.
- the upper-side tether 81 and the lower-side tether 82 are respectively joined to the inside base cloth 6 particularly by sewing. More specifically, the upper-side tether 81 is joined to the inside base cloth 6 at two points of a front-side joint portion 83 and a rear-side joint portion 84. Likewise, the lower-side tether 82 is joined to the inside base cloth 6 at two points of a front-side joint portion 85 and a rear-side joint portion 86.
- the rear-side joint portion 84 is constituted by sewing respective rear portions of the inside base cloth 6 and the upper-side tether 81 which overlap each other.
- the front-side joint portion 83 is constituted by reeling a front end portion 61 of the inside base cloth 6, which is shown by a dotted line in FIG. 4 , rearwardly (see an arrow shown by a dotted line in FIG. 4 ) and sewing this reeled portion and a middle part of the upper-side tether 81.
- the rear-side joint portion 86 is particularly constituted by sewing respective rear portions of the inside base cloth 6 and the lower-side tether 82 which overlap each other.
- the front-side joint portion 85 is constituted by reeling a middle portion 62 of the inside base cloth 6, which is shown by another dotted line in FIG. 4 , rearwardly (see another arrow shown by another dotted line in FIG. 4 ) and sewing this reeled portion and a middle part of the lower-side tether 82.
- a length L1 in the vehicle longitudinal direction, between the front-side joint portion 83 and the rear-side joint portion 84 of the upper-side tether 81 and a length L2, in the vehicle longitudinal direction, between the front-side joint portion 85 and the rear-side joint portion 86 of the lower-side tether 82 are respectively shorter than a length L3, in the vehicle longitudinal direction, between the front-side joint portions 83, 85 and the rear-side joint portions 84, 86 of the inside base cloth 6.
- the length L3 is a length extending along a cloth surface of the inside base cloth 6.
- the length L 2 in the vehicle longitudinal direction, between the front-side joint portion 85 and the rear-side joint portion 86 of the lower-side tether 82 is shorter than the length L1, in the vehicle longitudinal direction, between the front-side joint portion 83 and the rear-side joint portion 84 of the upper-side tether 81.
- FIG. 1 shows a state where the above-described airbag 5 is deployed or inflated by the inflation gas supplied from the inflater 11.
- a collision detection sensor not illustrated, which is attached to the side wall portion 4 detects the vehicle side collision
- a control device not illustrated, receives a detection signal of the collision detection sensor and then outputs an operation (activation) signal to the inflator 11. Thereby, the airbag 5 is deployed or inflated.
- the airbag 5 has a side-portion protection area 54 which is deployed at a side portion of the occupant 3 and a back-portion protection area 55 which is deployed at a back portion of the occupant 3.
- FIG. 5 shows an A-A section of FIG. 1 .
- the A-A section corresponds to the level of the chest portion of the occupant 3.
- FIG. 6 shows a B-B section of FIG. 1 .
- the B-B section corresponds to the level of the lumbar portion of the occupant 3.
- the side-portion protection area 54 is formed by the outside base cloth 7 which is substantially positioned on the outward side, in the vehicle width direction, of the tether 8
- the back-portion protection area 55 is formed by the inside base cloth 6 which is substantially positioned on the inward side, in the vehicle width direction, of the tether 8.
- the outside base cloth 7 is deployed forwardly and in the vehicle vertical direction from the side portion of the seatback 22.
- the outside base cloth 7 forms the side-portion protection area 54 which protects the side portion of the occupant 3.
- the length L1, L2, in the vehicle longitudinal direction, between the front-side joint portions 83, 85 and the rear-side joint portions 84, 86 of the upper-side tether 81 and the lower-side tether 82 is the length L3, in the vehicle longitudinal direction, between the front-side joint portions 83, 85 and the rear-side joint portions 84, 86 of the inside base cloth 6. Accordingly, the inside base cloth 6 is suppressed from being deployed forwardly by the upper-side tether 81 and the lower-side tether 82.
- FIG. 1 A dotted line shown in FIG. 1 imaginarily shows a shape of a front end of the inside base cloth 6 when the inside base cloth 6 where the tether 8 is not joined is deployed. As apparent from this figure, forward deployment of the inside base cloth 6 is regulated (restricted).
- the part of the inside base cloth 6 which is positioned at the level where the upper-side tether 81 and the lower-side tether 82 are provided is deployed inwardly in the vehicle width direction instead of its forward deployment. That is, the inside base cloth 6 which is loosened between the front-side joint portions 83, 85 and the rear-side joint portions 84, 86 is deployed between the back portion of the occupant 3 and the seatback 22 as the back-portion protection area 55.
- the back-portion protection area 55 reduces a space formed between the back portion of the occupant 3 and the seatback 22 and applies a load which is directed toward an inward side, in the vehicle width direction, to a rib's rear side of the occupant 3 as shown by a white arrow in FIG. 5 .
- the occupant 3 is moved in such a manner that the upper body is twisted toward the inward side, in the vehicle width direction, so that a space between the occupant 3 and the side wall portion 4 expands. Consequently, the collision impact applied to the occupant 3 in the vehicle side collision can be reduced.
- a bone's cross section at around a backbone (spine) of the rib's rear side shows the large (thick) shape and the high resistance against the impact as schematically shown in FIG. 5 .
- the bone's cross section at around a breast bone of the rib's front side shows the small (slender) shape and the low resistance against the impact. Since the back-portion protection area 55 is deployed between the back portion of the occupant 3 and the seatback 22, a load-distribution ratio at the high-resistance part of the rib's rear side becomes larger than that at the low-resistance part of the rib's front side. That is, the above-described airbag 5 can optimize the load distribution at the chest portion of the occupant 3.
- the airbag 5 is configured such that the length, in the longitudinal direction, of the chest-portion protection area 52 is shorter than the length, in the longitudinal direction, of each of the shoulder-portion protection area 51 and the lumbar-portion protection area 53 and the front end of the chest-portion protection area 52 is recessed rearwardly even in a case where the airbag 5 is deployed (see FIGS. 1 and 5 ).
- This structure can also suppress the impact load from being applied to the low-resistance part of the rib's front side.
- the rear-side joint portions 84, 86 are respectively set, in the deployment state of the airbag 5, to be positioned on the vehicle forward side of a front end portion of the first side frame 231 but, particularly, on the vehicle rearward side of an imaginary line 31 which connects a hip point and a center position of the shoulder portion of the occupant 3 seated in the vehicle seat in a vehicle side view.
- the occupant 3 is configured to be a human body dummy for side-collision test (AM50).
- This dummy is the AM50 model (which is defined as the human dummy model which covers 50% of American male adults) of the international standard side-impact (side-collision) dummy (World SID 50th Percentile), for example.
- the tether 8 can regulate (restrict) the forward deployment of the inside base cloth 6, so that the airbag 5 can be deployed properly between the back portion of the occupant 3 and the seatback 22.
- the length L2 in the vehicle longitudinal direction, between the front-side joint portion 83 and the rear-side joint portion 84 of the lower-side tether 82 is shorter than the length L1, in the vehicle longitudinal direction, between the front-side joint portion 85 and the rear-side joint portion 86 of the upper-side tether 81.
- a gap between the back portion of the occupant 3 and the seatback 22 changes in the vehicle vertical direction such that its upper side corresponding to the upper part of the seatback 22 is wider than its lower side corresponding to the lower part of the seatback 22.
- the back-portion protection area 55 is deployed in such a manner that its upper part is deployed widely and its lower part is deployed narrowly, so that the back-portion protection area 55 is deployed so as to match the size of the above-described gap between the back portion of the occupant 3 and the seatback 22. Accordingly, the load-distribution ratio at the high-resistance part of the rib's rear side of the occupant 3 can be made uniform.
- the back-portion protection area 55 at the lower part of the inside base cloth 6 is small, the lower part of the inside base cloth 6 can be deployed forwardly.
- the forward deployment of the inside base cloth 6 is regulated (restricted) by the lower-side tether 82 more than the deployment of the outside base cloth 7. Consequently, as shown in FIG. 6 , in the lumbar-portion protection area 53, the front portion of the airbag 5 is bent inwardly, in the vehicle width direction, so that the airbag 5 is deployed along an outer periphery of the lumbar portion of the occupant's side portion. Thereby, the airbag 5 can distribute (disperse) the impact load at a whole part of the lumbar portion.
- the tether 8 is provided at the chest-portion protection area 52 and the lumbar-portion protection area 53, but not at the shoulder-portion protection area 51.
- the shoulder-portion protection area 51 can be deployed forwardly widely and protect the side of the shoulder portion of the occupant 3.
- the airbag 5 With respect to a position below the shoulder-portion protection area 51, the airbag 5 is deployed between the back portion of the occupant 3 and the seatback 22, whereby the load-distribution ratio at the rib's rear side and the lumbar portion can be made large.
- the ideal load-distribution ratio can be achieved (attained) by means of the airbag 5.
- the airbag 5 which has not be inflated yet is stored inside the side portion of the seatback 22 in the folded state as shown in FIG. 3 .
- the part of the airbag 5 which constitutes the back-portion protection area 55 is positioned on the inward side, in the vehicle width direction, of the first side frame 231 (i.e., on the right side in FIG. 3 ), and the part of the airbag 5 which constitutes the side-portion protection area 54 is positioned on the outward side, in the vehicle width direction, of the first side frame 231 (i.e., on the left side in FIG. 3 ).
- the back-portion protection area 55 can be deployed on the inward side, in the vehicle width direction, of the first side frame 231 and inwardly, without interfering with the side-portion protection area 54, and the side-portion protection area 54 can be deployed on the outward side, in the vehicle width direction, of the first side frame 231 and outwardly, without interfering with the back-portion protection area 55 (see FIGS. 5 and 6 ).
- the smooth deployment of the airbag 5 at the side portion and the back portion of the occupant can be attained.
- the back-portion protection area 55 is deployed such that the part of the inside base cloth 6 goes around the back portion of the occupant 3. That is, a part of the single airbag 5 becomes the side-portion protection area 54 and another part of the single airbag 5 becomes the back-portion protection area 55. Therefore, it is unnecessary to provide plural airbags, so that the compact airbag 5 can be provided. Thus, the installation property of the side airbag device 1 can be improved.
- FIG. 7 shows a modification of the airbag.
- a modified airbag 50 is particularly configured such that the upper-side tether 81 is divided into a first upper-side tether 811 and a second upper-side tether 812, and the lower-side tether 82 is divided into a first lower-side tether 821 and a second lower-side tether 822.
- first lower-side tether 821 and the second lower-side tether 822 are respectively provided with front-side joint portions 851, 852 and rear-side joint portions 861, 862.
- a longitudinal position of the front-side joint portions 851, 852 is the same as a position of the above-described front-side joint portion 85
- a longitudinal position of the rear-side joint portions 861, 862 is the same as a position of the above-described rear-side joint portion 86.
- Reeled portions 621, 622 of the inside base cloth 6 which are reeled rearwardly are the same as the above-described ones as well.
- the side airbag device 1 provided with this airbag 50 can deploy the side-portion protection area 54 at the side of the occupant 3 as well, and deploy the back-portion protection area 55 between the back portion of the occupant 3 and the seatback 22 with its size which matches the size of the gap between the back portion of the occupant 3 and the seatback 22.
- the shape of the back-portion protection area 55 in the deployed state can be made to match a shape of the back of the occupant by increasing the number of the tether 8.
- the side airbag device 1 provided with the airbag 50 can compatibly attain optimization of the load distribution including the load applied to the high-resistance part of the skeleton structure of the human body and securement of the space between the occupant 3 and the side wall portion 4. Also, the side airbag device 1 is superior in the installation property.
- FIG. 8 shows another modification of the airbag.
- This modified airbag 500 is particularly configured such that the upper-side tether and the lower-side tether are integrated. That is, there is provided a single tether 80.
- the tether 80 expands both in the vehicle longitudinal direction and in the vehicle vertical direction.
- the tether 80 is provided with a front-side joint portion 87 and a rear-side joint portion 88.
- the front-side joint portion 87 and the rear-side joint portion 88 respectively extend in the vertical direction.
- the rear-side joint portion 88 extends vertically at the same position as the above-described rear-side joint portions 84, 86.
- the front-side joint portion 87 is provided such that its upper end portion is located substantially at the same position as the above-described front-side joint portion 83 and its lower end portion is located substantially at the same position as the above-described front-side joint portion 85. That is, the front-side joint portion 87 slants relative to the longitudinal direction.
- a dotted line in FIG. 8 shows a reeled portion 63 of the inside base cloth 6 which is reeled rearwardly.
- a longitudinal length between the front-side joint portion 87 and the rear-side joint portion 88 is configured such that the one of its upper side is relatively long and the one of its lower side is relatively short.
- the side airbag device 1 provided with this airbag 500 can deploy the side-portion protection area 54 at the side of the occupant 3 as well, and deploy the back-portion protection area 55 between the back portion of the occupant 3 and the seatback 22 with its size which matches the size of the gap between the back portion of the occupant 3 and the seatback 22.
- the side airbag device 1 provided with the airbag 500 can compatibly attain optimization of the load distribution including the load applied to the high-resistance part of the skeleton structure of the human body and securement of the space between the occupant 3 and the side wall portion 4. Also, the side airbag device 1 is so compact that it is superior in the installation property. Further, the structure of the airbag 500 becomes simple.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
- Seats For Vehicles (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020172767A JP2022064181A (ja) | 2020-10-13 | 2020-10-13 | サイドエアバッグ装置及び、これを備えた車両用シート |
Publications (2)
Publication Number | Publication Date |
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EP3984833A1 true EP3984833A1 (de) | 2022-04-20 |
EP3984833B1 EP3984833B1 (de) | 2023-04-12 |
Family
ID=78085442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP21199756.4A Active EP3984833B1 (de) | 2020-10-13 | 2021-09-29 | Seitenairbagvorrichtung, sitz für ein fahrzeug, fahrzeug, verfahren zum entfalten eines airbags und verwendung des airbags |
Country Status (4)
Country | Link |
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US (1) | US11518337B2 (de) |
EP (1) | EP3984833B1 (de) |
JP (1) | JP2022064181A (de) |
CN (1) | CN114347940B (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120200072A1 (en) * | 2011-02-04 | 2012-08-09 | Toyota Jidosha Kabushiki Kaisha | Vehicle side airbag apparatus |
US20140035264A1 (en) * | 2012-08-02 | 2014-02-06 | Toyota Jidosha Kabushiki Kaisha | Side airbag device for vehicle |
US20160114757A1 (en) * | 2014-10-27 | 2016-04-28 | Toyota Jidosha Kabushiki Kaisha | Vehicle side airbag device and manufacturing method of side airbag |
EP3018012A1 (de) * | 2013-07-03 | 2016-05-11 | Toyota Jidosha Kabushiki Kaisha | Seitenairbagvorrichtung für ein fahrzeug |
US20170182963A1 (en) | 2015-12-28 | 2017-06-29 | Toyoda Gosei Co., Ltd. | Vehicle seat with side airbag apparatus |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006035988A (ja) * | 2004-07-26 | 2006-02-09 | Toyoda Gosei Co Ltd | サイドエアバッグ装置 |
CN100441448C (zh) * | 2005-05-31 | 2008-12-10 | 丰田合成株式会社 | 用于保护乘员的方法与结构 |
JP5098231B2 (ja) * | 2006-06-22 | 2012-12-12 | 豊田合成株式会社 | サイドエアバッグ装置 |
JP2011005908A (ja) * | 2009-06-24 | 2011-01-13 | Toyoda Gosei Co Ltd | サイドエアバッグ装置 |
JP6428666B2 (ja) * | 2016-02-10 | 2018-11-28 | トヨタ自動車株式会社 | サイドエアバッグ装置を搭載した車両用シート |
US11104292B2 (en) * | 2017-05-17 | 2021-08-31 | Autoliv Development Ab | Side airbag device |
JP6919383B2 (ja) * | 2017-07-18 | 2021-08-18 | トヨタ自動車株式会社 | サイドエアバッグ装置を搭載した車両用シート |
US11383670B2 (en) * | 2019-09-30 | 2022-07-12 | Toyoda Gosei Co., Ltd. | Side airbag apparatus |
-
2020
- 2020-10-13 JP JP2020172767A patent/JP2022064181A/ja active Pending
-
2021
- 2021-08-16 US US17/403,604 patent/US11518337B2/en active Active
- 2021-08-27 CN CN202110995167.6A patent/CN114347940B/zh active Active
- 2021-09-29 EP EP21199756.4A patent/EP3984833B1/de active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120200072A1 (en) * | 2011-02-04 | 2012-08-09 | Toyota Jidosha Kabushiki Kaisha | Vehicle side airbag apparatus |
US20140035264A1 (en) * | 2012-08-02 | 2014-02-06 | Toyota Jidosha Kabushiki Kaisha | Side airbag device for vehicle |
EP3018012A1 (de) * | 2013-07-03 | 2016-05-11 | Toyota Jidosha Kabushiki Kaisha | Seitenairbagvorrichtung für ein fahrzeug |
US20160114757A1 (en) * | 2014-10-27 | 2016-04-28 | Toyota Jidosha Kabushiki Kaisha | Vehicle side airbag device and manufacturing method of side airbag |
US20170182963A1 (en) | 2015-12-28 | 2017-06-29 | Toyoda Gosei Co., Ltd. | Vehicle seat with side airbag apparatus |
JP2017119450A (ja) | 2015-12-28 | 2017-07-06 | 豊田合成株式会社 | サイドエアバッグ装置付き車両用シート |
Also Published As
Publication number | Publication date |
---|---|
EP3984833B1 (de) | 2023-04-12 |
JP2022064181A (ja) | 2022-04-25 |
US20220111814A1 (en) | 2022-04-14 |
US11518337B2 (en) | 2022-12-06 |
CN114347940B (zh) | 2024-03-26 |
CN114347940A (zh) | 2022-04-15 |
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